Electric riveter.



UNITED SfAll Selinunte Application iie pri 2913.

To all whom t 91mg/ concern.'

Be it known that l, SAMUEL S. Evenmin, a citizen of the Unite States, and e esidein` of Philadelphia, in the connt7 of "nilacle 'phia and State of Pennsylvania, lave Ventefl certainnew and useful -iin irove ments in Electric liveters, of which following is e specification.

Ghjects of the present invention are to provide a convenient, eiiicient and satisfactory electric 'riveter which constitutes in itself a complete shop tool, to provide ii'for 'applying the riveter to different circuits,

such for example as a 110 volt circuit or 220 volt circuit, which nre. the circuits practically exclusively in use; to provide for changing the voltage applied to the rivets Without substantial. loss and i ith eXpediLion and convenience; to provide for applying current to the rivets by means ci simple and convenient switch mechanism; to pre-- vent vaste of current, and` generally to pro-- vide an acceptable`r convenient anrl coinmercial electric riveter.

The invention will he claimed at the @nel hereof', but will first described in connes tion with the embodiments of it chosen for illustration in the accompanying drawn in whicha Figure l, is a side View with parts broken away ot' a riveter embodying features oic the .invention and adapted for nse in connection with a line circuit of one voltage. Figi'. 2, is

similar view illustrating the riveter cinhoflying a modification of the in vention und adapted for use in connection witl either ci: tivo line circuits of iliii'erent voltage, 3, is a sectional View, drawn to an enlarged scale, and illust lating` a (lef-ail of construction.. Fig. l: is a diagrammatic viev: of the circuits and connections of the machine shown in Fig. 2. Fig. 5, is a top partly ii section, of transformen, and C, is an elevational ViewY of the sameA in the fl awings i a hollow housing` er easing( provided with un over-hanging neel; 2. This frame or housing supports the elecW trofles 3 and il, between 'which 'the rivets are heated and riif'ctcilk The electrode G3 is carried by a post 5 Working in ways 6 of the neck 2 A rack and pinion operated by' a hand lever 7 afford means for anni lowering the electrode 3 and for applyiii with comparatively little effort greet i s snre upon it. The electrode 4; is insulated as et 8 fwm the lioiising l and is shown' carried "ij with the non.

Wn 'the ends et Y. The foot circi between the e it and continued turning puts pressure upon theg hentee :unl thus 4 ivorli. l' r electro es S ai in the secondi i3, iler e2 circuit c-'l i ln: means large condi an zitter is snincientlv ne? (iescriberl 'nivemen'f's o" limit the i ia gne-ti current is not ivi i' Y I. lne prima Wij; oli i.

primary ci rc u ferent points transformer showi'i four such comilnctoi and the;Y are nir-.nicer fi fi ceci-(ling to the the circuit i l doctors F21, 223

the coinlnctor 25S,

tor arm L" i the conductor il'. ic conrluxllois 30 may be the f I final in:

nie he cit i ne se" conn the .switch El' circ-,int the ",pcsetl in tin. l

which it lireA fl much lcv-Ier than. the current exi-cnil' hence the i l windings of the transformer in the primary circuit it follows that by shifting the arm the voltage in the secondary circuit can be changed and adjusted and inasmuch as the primary coils or windings of the transformer are cut in and out, current is not wasted as would be the case if a resistance or rheostat were used.

The general arrangement shown in Fig.

2, is as has been described in connection with Fig. l, except that the hand lever 7n is provided with a pawl 33 that engages a ratchet on the ratchet wheel 34 on the shaft of the pinipn that drives the rack and 'instead of using a foot lever for making and breaking the primary circuit a push button switch 35 is inserted in the end of the 'handle 7, Fig. 3. Furthermore the machine shown in Fig'. 2 is adapted for application to either of two circuits, either a 110 volt circuit or a 220 volt circuit. As shown in Fig. 2 the parts are in position for application to a 110 volt circuit and as shown in Fig 4i, the parts are in position for application to a 22() volt circuit.

Referring to Figs. 2 and 4, the position of the three pole switch 36 determines whether' the machine is adapted to a 110 volt'circuit or to a 220 volt circuit. In the former case the circuit is from 36 by switch 37 through push button 35 and then it divides, one part going by 38, arm 39 of switch 3G, conductor 40 to one end of one of the primary coils of the transformer, the other part goes by 4l to one end of the other primary coil of the transformer, thus the primary coil of the transformer is divided and the two parts are in parallel relation. 42 to 49 are conductors taken off from Icorresponding points of the windings of the two parts into which the primary coil is divided. Arms and 51 may be connected with like conductors `from each coil. As shown the circuit is by 42 and 4G to the arms 50 and 5l, thence from the arm 50through 52 and the switch arm to the conductor 56 and from the arm 5l by conductor 58 through the arm 54 to the conductor 56 by way of the conductor 57 and switch arm it will be understood that the position of the arms 50 and 51 controls the number of coils in each of the divisions of the primarv windings that are in circuit, so that by changing the arms the voltage in the secondary circuit is changed, it being understood, of course, that the arms must be connected to corresponding conductors. By using the two di sions of, the primary winding in parallel as described, each across a 110 volt circuit, the

same result is accomplished as would be accomplished by using the two divisions of the primary Winding in series across the 220 volt circuit. In the latter case the circuit is by 36, 37, 35, 41, one of the conductors 46 to Li9, the arm 5l, the conductor 53, the switch arm 5i, the conductor 58, the switch arm 39, the conductor 40, the other division of the primary winding, one of the conductors Ll2 to Ll5 according to the voltage required in the secondary circuit, the arm 50, the conductor 52, the switch arm 55, and the conductor 56. The two primary coils of the transformer may be arranged as shown in Figs. 5 and 6 and in this case the secondary circuit is formed by a generally ligure -shaped frame 60 and the primary windings 6l and G2 as well as the frame 60 are clamped between plates 63 by means of bolts 6i. The various switches and electrical controlling devices are arranged within the housing so that the device is a complete tool, self-contained and ready for shipment and application to use. v

It will be obvious to those skilled in the art that departure may be made in matters of construction Vand arrangement without departing from the spirit of the invention, hence I do not limit myself to those matters oi" in any way further than the prior state of the art may. require, but

Having thus described the nature and objects of my invention what I claim as new and desire to secure by Letters Patent is:

l. In an electric riveter the combination of a transformer of which the' secondary constitutes the riveting circuit and of which the primary comprises a sub-divided winding, connections for interrupting the primary circuit, and connections for putting the sub-divisions of the primary in series and in parallel relation, substantially as described. I v

2. ln an electric riveter the combination with the secondary circuit of a dia-magnetic baiie for interrupting an induced magnetic flux.

3. In an electric riveter the combination of a housing, a support detachably connected therewith, means for insulating the support, and a dia-magnetic plate carried by the support and constituting one of the electrodes, substantially as described. ln testimony whereof I have hereunto signed my name.

SLU/IUEL S. EVELAND. lNitnesses:

Cmuronn K. Cnssnn, FRANK E. FnnNcn'. 

